Publish Layerfault deep challenge LF-CH-PROV-0004

CHALLENGE_ORACLE.json

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+{
+  "attack_surface": [
+    "provenance-integrity"
+  ],
+  "control_type": "positive",
+  "corpus_id": "LF-CH-PROV-0004",
+  "difficulty": "compound",
+  "expected_decision": "BLOCK",
+  "ground_truth": "synthetic-generated",
+  "layerfault_rule_expectations": {
+    "candidate_rules": [],
+    "expected_rules": [],
+    "must_not_rules": []
+  },
+  "oracle_ids": [
+    "LF-ORACLE-PROV-0004"
+  ],
+  "related_cases": [],
+  "repo_name": "provenance-unexpected-extra-file",
+  "safe_fixture": true,
+  "schema": 2,
+  "severity": "high",
+  "techniques": [
+    "unexpected",
+    "extra",
+    "file"
+  ],
+  "transformations": []
+}

FIXTURE_LAYOUT.json

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+{
+  "artifacts": [
+    "model.safetensors",
+    "unexpected.bin",
+    "SHA256_DECLARED.json"
+  ],
+  "family": "provenance",
+  "note": "All content is synthetic and inert. Do not treat this as a production model.",
+  "repo_name": "provenance-unexpected-extra-file"
+}

LAYERFAULT_CORPUS.json

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+{
+  "candidate_rules": [],
+  "challenge": {
+    "attack_surface": [
+      "provenance-integrity"
+    ],
+    "control_type": "positive",
+    "difficulty": "compound",
+    "expected_decision": "BLOCK",
+    "oracle_ids": [
+      "LF-ORACLE-PROV-0004"
+    ],
+    "related_cases": [],
+    "severity": "high",
+    "techniques": [
+      "unexpected",
+      "extra",
+      "file"
+    ],
+    "transformations": []
+  },
+  "corpus_id": "LF-CH-PROV-0004",
+  "description": "Provenance unexpected extra file.",
+  "expected_rules": [],
+  "generator": "challenges.generate_challenge",
+  "ground_truth": "synthetic-generated",
+  "must_not_rules": [],
+  "repo_name": "provenance-unexpected-extra-file",
+  "repo_type": "model",
+  "safe_fixture": true,
+  "safety": "inert/canary-only",
+  "schema": 1,
+  "validation": {
+    "kind": "verify-package",
+    "target": "."
+  }
+}

README.md

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+---
+license: apache-2.0
+tags:
+- layerfault
+- security-research
+- model-security
+- synthetic
+- adversarial-testing
+extra_gated_prompt: >-
+  This repository is a synthetic security-test artifact from the Layerfault
+  corpus. It intentionally contains adversarial characteristics (e.g.
+  suspicious pickle opcodes, executable-format smuggling, prompt-injection
+  strings) designed to exercise security scanner detection rules. It is
+  **not** a usable ML model and must never be loaded or executed outside an
+  isolated scanner-testing environment. By accepting, you confirm you
+  understand this repository is a test fixture, not production model
+  weights.
+extra_gated_button_content: I understand this is a security test fixture and accept the risk
+gated: auto
+---
+
+# provenance-unexpected-extra-file
+
+> **SECURITY TEST ARTIFACT: DO NOT USE AS A PRODUCTION MODEL**
+
+This repository is part of the Layerfault synthetic security corpus.
+It is deliberately constructed to contain security-relevant characteristics for scanner testing.
+
+**Corpus ID:** `LF-CH-PROV-0004`
+
+## Purpose
+
+Provenance unexpected extra file.
+
+## Direct expected Layerfault rules
+
+- None; this repository is a control/comparison input.
+
+## Candidate rules
+
+These are deliberately plausible targets that remain marked as candidates until the exact
+Layerfault build used for certification confirms them.
+
+- None
+
+## Negative-control rules
+
+These should remain silent for this corpus item.
+
+- None
+
+## Safety
+
+The corpus uses fake secrets, loopback/`.invalid` network destinations, harmless marker output,
+and synthetic model behavior only. It is intended for static scanning and isolated security testing.
+
+## Challenge classification
+
+- Severity: **high**
+- Difficulty: **compound**
+- Expected admission decision: **BLOCK**
+- Control type: **positive**
+- Attack surface: provenance-integrity
+- Techniques: unexpected, extra, file
+- Transformations: none
+
+### Ground-truth oracle IDs
+
+- `LF-ORACLE-PROV-0004`
+
+These oracle IDs describe synthetic ground truth. They do not claim that a
+matching Layerfault detector already exists. A challenge may intentionally expose
+a scanner blind spot and remain unmapped until the detector is implemented.

SHA256SUMS.json

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+[
+  {
+    "path": "CHALLENGE_ORACLE.json",
+    "sha256": "9371683c6e8b46ee2bbc070ea6a913a4ff8ed207d259eb382c6806865a40f23c",
+    "size": 615
+  },
+  {
+    "path": "FIXTURE_LAYOUT.json",
+    "sha256": "899d25e222360a6b1f52bb3d27eab33679ab9f0ead129c6ac917aee6a7cd22b2",
+    "size": 266
+  },
+  {
+    "path": "LAYERFAULT_CORPUS.json",
+    "sha256": "51b179376a8ca3dd7885c4e5b6556b72ecae8c98aa935baa116b1a3c720ee4a6",
+    "size": 854
+  },
+  {
+    "path": "README.md",
+    "sha256": "7e6bf987f136dbe4461d987d39a4679ad0cf31702f7f9fccbd9748b21b7be498",
+    "size": 2211
+  },
+  {
+    "path": "SHA256_DECLARED.json",
+    "sha256": "48a993cc7258cf1888f193039504e42e8eb03867d782bc1ab50857c58ae24fbb",
+    "size": 94
+  },
+  {
+    "path": "model.safetensors",
+    "sha256": "f8ca6e7765b461685ef1034fe6bbac8a0cfc3f79802ab1124b53701d844c71e2",
+    "size": 184
+  },
+  {
+    "path": "unexpected.bin",
+    "sha256": "978b371ca8872c23cb772264aa60ad99933db8d46c971af9d2b2844ee431b1b4",
+    "size": 18
+  }
+]

SHA256_DECLARED.json

@@ -0,0 +1,3 @@
+{
+  "model.safetensors": "f8ca6e7765b461685ef1034fe6bbac8a0cfc3f79802ab1124b53701d844c71e2"
+}

model.safetensors

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+version https://git-lfs.github.com/spec/v1
+oid sha256:f8ca6e7765b461685ef1034fe6bbac8a0cfc3f79802ab1124b53701d844c71e2
+size 184

unexpected.bin

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:978b371ca8872c23cb772264aa60ad99933db8d46c971af9d2b2844ee431b1b4
+size 18